PubMed:32031570 / 288-290
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T45","span":{"begin":0,"end":2},"obj":"IN"}],"text":"on"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok52","span":{"begin":0,"end":2},"obj":"IN"}],"text":"on"}